TGC driving circuit, device and equipment

Abstract

The present invention proposes a TGC drive circuit, device, and equipment. The TGC drive circuit includes a signal conversion module, a differential operational amplifier module, and a feedback adjustment module. The differential operational amplifier module is connected to the signal conversion module and the feedback adjustment module, respectively. The signal conversion module outputs a single-ended analog signal to the differential operational amplifier module upon receiving a digital drive signal. The differential operational amplifier module outputs a differential drive signal to an ultrasonic diagnostic device upon receiving a single-ended analog signal, causing the ultrasonic diagnostic device to output a voltage signal to the feedback adjustment module. The feedback adjustment module outputs a differential adjustment signal to the differential operational amplifier module upon receiving a voltage signal. The differential operational amplifier module processes the differential drive signal upon receiving the differential adjustment signal and drives the ultrasonic diagnostic device with the processed differential drive signal. The present invention improves the signal-to-noise ratio of the differential drive signal through the above circuit, thereby obtaining a high-resolution ultrasonic gain-compensated image.

Description

Technical Field

[0001] The present invention relates to the field of ultrasonic technology, and in particular to a TGC driving circuit, device and equipment. Background Art

[0002] Ultrasound diagnostic equipment uses ultrasound echo technology to detect human diseases by transmitting ultrasound waves into the human body and receiving echoes. Time gain compensation (TGC) adjusts the sensitivity of the received echo signal based on the time since the signal was transmitted, compensating for the same brightness. In ultrasound receiver circuits, the analog front-end chip that processes the echo signal includes TGC functionality. The signal-to-noise ratio of the TGC drive signal determines the quality of image compensation. Improving the signal-to-noise ratio of the TGC drive signal is a critical issue.

[0003] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides a TGC driving circuit, comprising: a signal conversion module, a differential operational amplifier module, and a feedback adjustment module, wherein the differential operational amplifier module is connected to the signal conversion module and the feedback adjustment module respectively;

[0005] The signal conversion module is used to output a single-ended analog signal to the differential operational amplifier module when receiving a digital driving signal;

[0006] The differential operational amplifier module is used to differentiate the single-ended analog signal, perform secondary filtering on the obtained differential signal, and output a differential drive signal to the ultrasonic diagnostic device, so that the ultrasonic diagnostic device outputs a voltage signal to the feedback adjustment module;

[0007] The feedback adjustment module is configured to output a differential adjustment signal to the differential operational amplifier module upon receiving the voltage signal;

[0008] The differential operational amplifier module is further configured to perform signal processing on the differential drive signal upon receiving the differential adjustment signal, and drive the ultrasonic diagnostic device to operate via the processed differential drive signal.

[0009] Optionally, the signal conversion module includes a DAC chip, first to third capacitors, a first resistor and a second resistor;

[0010] The first pin, the second pin and the third pin of the DAC chip are connected to the FPGA circuit, the fifth pin of the DAC chip is grounded, the eighth pin of the DAC chip is connected to the first end of the first capacitor, the first end of the first capacitor is connected to an external power supply, the second end of the first capacitor is grounded, the fourth pin of the DAC chip is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the first end of the first resistor, the first end of the first resistor is also connected to the first end of the second resistor, the second end of the first resistor is grounded, the second end of the second resistor is connected to the first end of the third capacitor, the second end of the third capacitor is grounded, and the first end of the third capacitor is connected to the differential op amp module.

[0011] Optionally, the differential operational amplifier module includes an operational amplifier circuit unit and a signal filtering unit, and the operational amplifier circuit unit and the signal filtering unit are connected;

[0012] The operational amplifier circuit unit is configured to, upon receiving the single-ended analog signal, perform differential operation on the single-ended analog signal and output the differential drive signal to the signal filtering unit;

[0013] The signal filtering unit is used to perform secondary filtering on the differential driving signal when receiving the differential driving signal and transmit the signal to the ultrasonic diagnostic device, so that the ultrasonic diagnostic device outputs a voltage signal to the feedback adjustment module.

[0014] Optionally, the operational amplifier circuit unit includes an impedance matching subunit and a differential amplification subunit;

[0015] The impedance matching subunit is configured to process the single-ended analog signal upon receiving the single-ended analog signal, and transmit the processed single-ended analog signal to the differential amplification subunit;

[0016] The differential amplifier unit is configured to, upon receiving the processed single-ended analog signal, perform differential processing on the processed single-ended analog signal and output the differential drive signal to the signal filtering unit.

[0017] Optionally, the impedance matching subunit includes a first operational amplifier, a third resistor, a fourth capacitor and a fifth capacitor;

[0018] The first pin of the first operational amplifier is connected to the first end of the third resistor, the second pin of the first operational amplifier is connected to the first end of the fifth capacitor, the third pin of the first operational amplifier is connected to the first end of the third capacitor, the fourth pin of the first operational amplifier is connected to the first end of the third resistor, the fifth pin of the first operational amplifier is connected to the first end of the fourth capacitor, the first end of the fourth capacitor is connected to an external power supply, the second end of the fourth capacitor is grounded, the first end of the fifth capacitor is connected to the external power supply, the second end of the fifth capacitor is grounded, and the second end of the third resistor is connected to the differential amplifier unit.

[0019] Optionally, the differential amplifier subunit includes a second operational amplifier, fourth to sixth resistors and sixth to ninth capacitors;

[0020] A first pin of the second operational amplifier is connected to the second end of the fourth resistor, a second pin of the second operational amplifier is connected to the feedback adjustment module, a third pin of the second operational amplifier is connected to the first end of the seventh capacitor, a fourth pin of the second operational amplifier is connected to the signal filtering unit, a fifth pin of the second operational amplifier is connected to the signal filtering unit, a sixth pin of the second operational amplifier is connected to the first end of the eighth capacitor, a seventh pin of the second operational amplifier is connected to the second end of the eighth capacitor, an eighth pin of the second operational amplifier is connected to the second end of the third resistor, and a ninth pin of the second operational amplifier is connected to the second end of the eighth capacitor. The first end of the sixth capacitor is connected to the first end of the fifth resistor, the second end of the sixth capacitor is connected to the second end of the fifth resistor, the first end of the fifth resistor is connected to the second end of the third resistor, the second end of the fifth resistor is connected to the signal filtering unit, the first end of the seventh capacitor is connected to an external power supply, the second end of the seventh capacitor is grounded, the first end of the eighth capacitor is connected to an external power supply, the second end of the eighth capacitor is grounded, the first end of the ninth capacitor is connected to the first end of the sixth resistor, the second end of the ninth capacitor is connected to the second end of the sixth resistor, the first end of the sixth resistor is connected to the second end of the fourth resistor, and the second end of the sixth resistor is connected to the signal filtering unit.

[0021] Optionally, the signal filtering unit includes seventh to tenth resistors and tenth to thirteenth capacitors;

[0022] The first end of the tenth capacitor is connected to the second end of the fifth resistor, the second end of the tenth capacitor is connected to the second end of the seventh resistor, the first end of the eleventh capacitor is connected to the second end of the sixth resistor, the second end of the eleventh capacitor is connected to the second end of the eighth resistor, the first end of the seventh resistor is grounded, the second end of the seventh resistor is connected to the first end of the ninth resistor, the first end of the eighth resistor is grounded, the second end of the eighth resistor is connected to the first end of the tenth resistor, the first end of the twelfth capacitor is grounded, the second end of the twelfth capacitor is connected to the second end of the ninth resistor, and the second end of the ninth resistor is also connected to the ultrasonic diagnostic equipment. The first end of the thirteenth capacitor is grounded, the second end of the thirteenth capacitor is connected to the second end of the tenth resistor, and the second end of the tenth resistor is also connected to the ultrasonic diagnostic equipment.

[0023] Optionally, the feedback adjustment module includes a voltage reference chip, a voltage follower, fourteenth to seventeenth capacitors, an eleventh resistor, and a twelfth resistor;

[0024] The first pin of the voltage reference chip is connected to the second end of the sixteenth capacitor, the second pin of the voltage reference chip is connected to the second end of the seventeenth capacitor, the third pin of the voltage reference chip is connected to the first end of the fourteenth capacitor, the fourth pin of the voltage reference chip is connected to the first end of the fifteenth capacitor, the fifth pin of the voltage reference chip is connected to the first end of the sixteenth capacitor, the sixth pin of the voltage reference chip is connected to the first end of the seventeenth capacitor, the second end of the fourteenth capacitor is grounded, the second end of the fifteenth capacitor is grounded, and the first end of the fourteenth capacitor is connected to the first end of the fifteenth capacitor The first end of the fourteenth capacitor is also connected to the ultrasonic diagnostic equipment, the first end of the eleventh resistor is connected to the first end of the sixteenth capacitor, the first end of the eleventh resistor is also connected to the first end of the seventeenth capacitor, the first end of the twelfth resistor is connected to the second end of the eleventh resistor, the second end of the twelfth resistor is connected to the second end of the sixteenth capacitor, the second end of the twelfth resistor is grounded, the second end of the twelfth resistor is also connected to the second end of the seventeenth capacitor, the voltage follower input end is connected to the second end of the eleventh resistor, and the voltage follower output end is connected to the second pin of the second operational amplifier.

[0025] To achieve the above objectives, the present invention further provides a TGC driving device, which includes the TGC driving circuit as described above.

[0026] To achieve the above objectives, the present invention further provides a TGC driving device, which includes the TGC driving apparatus as described above.

[0027] The technical solution of the present invention proposes a TGC driving circuit, which includes: a signal conversion module, a differential operational amplifier module and a feedback adjustment module, wherein the differential operational amplifier module is connected to the signal conversion module and the feedback adjustment module respectively; the signal conversion module is used to output a single-ended analog signal to the differential operational amplifier module when receiving a digital driving signal; the differential operational amplifier module is used to output a differential driving signal to an ultrasonic diagnostic device when receiving the single-ended analog signal, so that the ultrasonic diagnostic device outputs a voltage signal to the feedback adjustment module; the feedback adjustment module is used to output a differential adjustment signal to the differential operational amplifier module when receiving the voltage signal; the differential operational amplifier module is further used to perform signal processing on the differential driving signal when receiving the differential adjustment signal, and drive the ultrasonic diagnostic device to work through the processed differential driving signal. The present invention improves the signal-to-noise ratio of the TGC drive circuit control signal by controlling and adjusting the generation and transmission process of the TGC drive signal, enabling the front-end analog chip to parse data with lower noise, thereby solving the ultrasonic image interference problem caused by the noise of the existing TGC drive circuit and ultimately obtaining a high-resolution ultrasonic gain compensated image. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 A functional module diagram of a circuit embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the circuit structure of an embodiment of the circuit of the present invention;

[0031] Figure 3 A functional module diagram of a circuit embodiment of the present invention;

[0032] Figure 4 FIG. 1 is a functional module diagram of a circuit embodiment of the present invention.

[0033] Description of Figure Numbers:

[0034] Label name Label name 10 Signal conversion module R1~R14 The first resistor to the fourteenth resistor 20 Differential op amp module C1~C21 The first capacitor to the twenty-first capacitor 30 Feedback adjustment module U1 DAC chip 21 Op amp circuit unit U2 First operational amplifier 22 Signal filtering unit U3 Second operational amplifier 211 Impedance matching subunit U4 Voltage reference chip 212 Differential amplifier subunit U5 The third operational amplifier

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides a TGC driving circuit.

[0040] Reference Figure 1 In an embodiment of the present invention, the TGC driving circuit includes: a signal conversion module 10, a differential operational amplifier module 20, and a feedback adjustment module 30, wherein the differential operational amplifier module 20 is connected to the signal conversion module 10 and the feedback adjustment module 30 respectively;

[0041] The signal conversion module 10 is used to output a single-ended analog signal to the differential operational amplifier module when receiving a digital driving signal;

[0042] It should be noted that the digital drive signal received by the signal conversion module 10 is a circuit startup electrical signal, which can be generated by an FPGA circuit external to the TGC drive circuit. After the signal conversion module 10 receives the digital drive signal, it will perform D / A conversion on the digital drive signal through the DAC circuit, and then output a single-ended analog signal to the differential operational amplifier module 20.

[0043] The differential operational amplifier module 20 is used to differentiate the single-ended analog signal, perform secondary filtering on the obtained differential signal, and output a differential drive signal to the ultrasonic diagnostic device, so that the ultrasonic diagnostic device outputs a voltage signal to the feedback adjustment module;

[0044] In a specific implementation, the specific circuit structure of the differential operational amplifier module 20 is composed of a voltage follower and a differential amplifier. When the differential operational amplifier module 20 receives the single-ended analog signal, it will first perform signal processing through the voltage follower. Due to the electrical characteristics of the voltage follower with high input impedance and low output impedance, the processed single-ended analog signal can be completely transmitted to the differential amplifier. Subsequently, the differential amplifier performs gain amplification and differentiation to convert the single-ended analog signal into the differential drive signal and output it to the ultrasonic diagnostic equipment, so that the ultrasonic diagnostic equipment outputs a voltage signal to the feedback adjustment module.

[0045] The feedback adjustment module 30 is configured to output a differential adjustment signal to the differential operational amplifier module upon receiving the voltage signal;

[0046] It should be noted that the voltage signal is a feedback adjustment electrical signal emitted by the ultrasonic diagnostic equipment, and its function is to perform feedback adjustment on the generation process of the differential drive signal in the differential operational amplifier module 20 through the feedback adjustment module 30 .

[0047] In a specific implementation, the specific method of performing feedback adjustment on the generation process of the differential drive signal in the differential operational amplifier module 20 is to generate a high-precision operational amplifier voltage to achieve differential amplification gain adjustment and signal compensation control.

[0048] The differential operational amplifier module 20 is further configured to process the differential driving signal upon receiving the differential adjustment signal, and drive the ultrasonic diagnostic device to operate via the processed differential driving signal.

[0049] It is understandable that, upon receiving the differential adjustment signal, the differential operational amplifier module 20 will perform differential amplification gain adjustment and signal compensation control on the generation process of the differential drive signal, thereby obtaining a differential drive signal with a higher signal-to-noise ratio.

[0050] Further, refer to Figure 2The signal conversion module 10 includes a DAC chip U1, first to third capacitors C1-C3, a first resistor R1 and a second resistor R2; the first pin, the second pin and the third pin of the DAC chip are connected to the FPGA circuit, the fifth pin of the DAC chip is grounded, the eighth pin of the DAC chip is connected to the first end of the first capacitor, the first end of the first capacitor is connected to an external power supply, the second end of the first capacitor is grounded, the fourth pin of the DAC chip is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the first end of the first resistor, the first end of the first resistor is also connected to the first end of the second resistor, the second end of the first resistor is grounded, the second end of the second resistor is connected to the first end of the third capacitor, the second end of the third capacitor is grounded, and the first end of the third capacitor is connected to the differential operational amplifier module.

[0051] It should be noted that the DAC chip can be TLV5626. In a specific implementation, the DAC chip will first receive the digital drive signal generated by the FPGA circuit external to the TGC drive circuit. Then the DAC chip will convert the digital signal into a single-ended analog signal through D / A conversion and transmit it to the filtering circuit. The filtering circuit will then output the filtered single-ended analog signal to the differential operational amplifier module 20 to complete the signal conversion process.

[0052] This embodiment provides a TGC drive circuit, comprising: a signal conversion module, a differential operational amplifier module, and a feedback adjustment module, the differential operational amplifier module being connected to the signal conversion module and the feedback adjustment module, respectively. The signal conversion module is configured to output a single-ended analog signal to the differential operational amplifier module upon receiving a digital drive signal. The differential operational amplifier module is configured to output a differential drive signal to an ultrasonic diagnostic device upon receiving the single-ended analog signal, causing the ultrasonic diagnostic device to output a voltage signal to the feedback adjustment module. The feedback adjustment module is configured to output a differential adjustment signal to the differential operational amplifier module upon receiving the voltage signal. The differential operational amplifier module is further configured to process the differential drive signal upon receiving the differential adjustment signal, and drive the ultrasonic diagnostic device using the processed differential drive signal. This embodiment improves the signal-to-noise ratio of the TGC drive circuit control signal by controlling and adjusting the generation and transmission processes of the TGC drive signal, enabling the front-end analog chip to analyze data with lower noise, thereby resolving the ultrasonic image interference problem caused by noise in existing TGC drive circuits and ultimately obtaining high-resolution ultrasonic gain-compensated images.

[0053] Reference Figure 3 , Figure 3 This is a schematic diagram of a module of a second embodiment of a TGC driving circuit of the present invention, based on the above Figure 1 The embodiment shown provides a second embodiment of a TGC driving circuit of the present invention.

[0054] In this embodiment, the differential operational amplifier module 20 includes an operational amplifier circuit unit 21 and a signal filtering unit 22, and the operational amplifier circuit unit 21 and the signal filtering unit 22 are connected;

[0055] The operational amplifier circuit unit 21 is configured to, upon receiving the single-ended analog signal, perform differential operation on the single-ended analog signal and output the differential driving signal to the signal filtering unit;

[0056] It should be noted that when the operational amplifier circuit unit 21 receives the single-ended analog signal, it will first process the single-ended analog signal through a voltage follower. This signal processing can improve the load capacity of the overall circuit while keeping the signal waveform and amplitude of the single-ended analog signal unchanged. The processed single-ended analog signal is then output to the differential amplifier, and the differential amplifier converts the processed single-ended analog signal into the differential drive signal through gain amplification and differential operation.

[0057] The signal filtering unit 22 is configured to perform secondary filtering on the differential driving signal upon receiving the differential driving signal and transmit the filtered signal to the ultrasonic diagnostic device, so that the ultrasonic diagnostic device outputs a voltage signal to the feedback adjustment module.

[0058] In a specific implementation, the signal filtering unit 22 performs signal filtering processing on the differential driving signal output by the operational amplifier circuit unit 21 through a filtering circuit, and outputs the filtered differential driving signal to the ultrasonic diagnostic device.

[0059] It should be noted that the ultrasonic diagnostic device is externally connected to the TGC drive circuit, and the ultrasonic receiving circuit is actually responsible for receiving the differential drive signal and providing signal feedback in the ultrasonic diagnostic device. After receiving the differential drive signal, the ultrasonic receiving circuit will also output a voltage signal to the feedback adjustment module 30.

[0060] Further, refer to Figure 4 , the operational amplifier circuit unit includes an impedance matching subunit and a differential amplifier subunit; the impedance matching subunit 211 is used to process the single-ended analog signal when receiving the single-ended analog signal, and transmit the processed single-ended analog signal to the differential amplifier subunit;

[0061] It should be noted that when the impedance matching subunit receives the single-ended analog signal, the input impedance of the impedance matching subunit circuit is high, while the output impedance is low, so that the signal loss of the single-ended analog signal is reduced when passing through.

[0062] The differential amplifier unit 212 is configured to, upon receiving the processed single-ended analog signal, perform differential processing on the processed single-ended analog signal and output the differential driving signal to the signal filtering unit.

[0063] In a specific implementation, when the differential amplifier unit 212 receives the processed single-ended analog signal, it will perform gain amplification and differential processing on the processed single-ended analog signal in sequence through the differential amplifier unit circuit, thereby obtaining the differential driving signal and outputting it to the signal filtering unit.

[0064] Further, refer to Figure 2 The impedance matching subunit 211 includes a first operational amplifier U2, a third resistor R3, a fourth capacitor C4 and a fifth capacitor C5; the first pin of the first operational amplifier is connected to the first end of the third resistor, the second pin of the first operational amplifier is connected to the first end of the fifth capacitor, the third pin of the first operational amplifier is connected to the first end of the third capacitor, the fourth pin of the first operational amplifier is connected to the first end of the third resistor, the fifth pin of the first operational amplifier is connected to the first end of the fourth capacitor, the first end of the fourth capacitor is connected to an external power supply, the second end of the fourth capacitor is grounded, the first end of the fifth capacitor is connected to the external power supply, the second end of the fifth capacitor is grounded, and the second end of the third resistor is connected to the differential amplifier subunit.

[0065] It should be noted that the first operational amplifier can be ADA4075-2. In a specific implementation, when the single-ended analog signal is transmitted to the impedance matching sub-unit 211, first, a voltage will exist at the third pin of the first operational amplifier, and then the first operational amplifier will work to transmit the single-ended analog signal to the differential amplifier sub-unit 212. The main circuit function of the impedance matching sub-unit 211 is to form a voltage follower to avoid large signal loss when the single-ended analog signal is transmitted.

[0066] The fourth capacitor and the fifth capacitor are both decoupling capacitors, and their main function is to filter the power supply so that the voltage applied to the first operational amplifier is more stable.

[0067] Further, the differential amplifier subunit 212 includes a second operational amplifier U3, fourth to sixth resistors R4-R6 and sixth to ninth capacitors C6-C9; a first pin of the second operational amplifier is connected to the second end of the fourth resistor, a second pin of the second operational amplifier is connected to the feedback adjustment module, a third pin of the second operational amplifier is connected to the first end of the seventh capacitor, a fourth pin of the second operational amplifier is connected to the signal filtering unit, a fifth pin of the second operational amplifier is connected to the signal filtering unit, a sixth pin of the second operational amplifier is connected to the first end of the eighth capacitor, a seventh pin of the second operational amplifier is connected to the second end of the eighth capacitor, and an eighth pin of the second operational amplifier is connected to the second end of the third resistor. The ninth pin of the second operational amplifier is connected to the second end of the eighth capacitor, the first end of the sixth capacitor is connected to the first end of the fifth resistor, the second end of the sixth capacitor is connected to the second end of the fifth resistor, the first end of the fifth resistor is connected to the second end of the third resistor, the second end of the fifth resistor is connected to the signal filtering unit, the first end of the seventh capacitor is connected to an external power supply, the second end of the seventh capacitor is grounded, the first end of the eighth capacitor is connected to an external power supply, the second end of the eighth capacitor is grounded, the first end of the ninth capacitor is connected to the first end of the sixth resistor, the second end of the ninth capacitor is connected to the second end of the sixth resistor, the first end of the sixth resistor is connected to the second end of the fourth resistor, and the second end of the sixth resistor is connected to the signal filtering unit.

[0068] It should be noted that the second operational amplifier can be THS4130. In a specific implementation, when the processed single-ended analog signal is transmitted to the differential amplifier subunit 212, there is a stable voltage at the second pin and the fifth pin of the second operational amplifier, and then the second operational amplifier works to convert the processed single-ended analog signal into the differential drive signal. The seventh capacitor and the eighth capacitor are decoupling capacitors whose main function is to be used for power supply filtering to make the voltage applied to the second operational amplifier more stable. The fifth resistor and the sixth capacitor are connected in parallel, and the sixth resistor and the ninth capacitor are connected in parallel to form a micro-filter circuit respectively, so as to reduce the noise signal in the generated differential drive signal.

[0069] Further, the signal filtering unit 22 includes seventh to tenth resistors and tenth to thirteenth capacitors; the first end of the tenth capacitor is connected to the second end of the fifth resistor, the second end of the tenth capacitor is connected to the second end of the seventh resistor, the first end of the eleventh capacitor is connected to the second end of the sixth resistor, the second end of the eleventh capacitor is connected to the second end of the eighth resistor, the first end of the seventh resistor is grounded, the second end of the seventh resistor is connected to the first end of the ninth resistor, the first end of the eighth resistor is grounded, the second end of the eighth resistor is connected to the first end of the tenth resistor, the first end of the twelfth capacitor is grounded, the second end of the twelfth capacitor is connected to the second end of the ninth resistor, and the second end of the ninth resistor is also connected to the ultrasonic diagnostic equipment, the first end of the thirteenth capacitor is grounded, the second end of the thirteenth capacitor is connected to the second end of the tenth resistor, and the second end of the tenth resistor is also connected to the ultrasonic diagnostic equipment.

[0070] It can be understood that when the signal filtering unit 22 receives the differential drive signal, an electrical signal first appears at the first end of the tenth capacitor and the eleventh capacitor. Then, since the first ends of the twelfth capacitor and the thirteenth capacitor are grounded, the second ends of the twelfth capacitor and the thirteenth capacitor are respectively connected to the ninth resistor and the tenth resistor to form a basic filtering circuit, thereby performing high-frequency filtering on the differential drive signal and filtering out the high-frequency signal.

[0071] Furthermore, the feedback adjustment module 30 includes a voltage reference chip, a voltage follower, fourteenth to seventeenth capacitors, an eleventh resistor, and a twelfth resistor; the first pin of the voltage reference chip is connected to the second end of the sixteenth capacitor, the second pin of the voltage reference chip is connected to the second end of the seventeenth capacitor, the third pin of the voltage reference chip is connected to the first end of the fourteenth capacitor, the fourth pin of the voltage reference chip is connected to the first end of the fifteenth capacitor, the fifth pin of the voltage reference chip is connected to the first end of the sixteenth capacitor, the sixth pin of the voltage reference chip is connected to the first end of the seventeenth capacitor, the second end of the fourteenth capacitor is grounded, and the second end of the fifteenth capacitor is grounded The first end of the fourteenth capacitor is connected to the first end of the fifteenth capacitor, and the first end of the fourteenth capacitor is also connected to the ultrasonic diagnostic equipment. The first end of the eleventh resistor is connected to the first end of the sixteenth capacitor, and the first end of the eleventh resistor is also connected to the first end of the seventeenth capacitor. The first end of the twelfth resistor is connected to the second end of the eleventh resistor, and the second end of the twelfth resistor is connected to the second end of the sixteenth capacitor. The second end of the twelfth resistor is grounded, and the second end of the twelfth resistor is also connected to the second end of the seventeenth capacitor. The voltage follower input end is connected to the second end of the eleventh resistor, and the voltage follower output end is connected to the second pin of the second operational amplifier.

[0072] In a specific implementation, when the feedback adjustment module 30 receives the voltage signal, it will perform a corresponding circuit function according to the size of the voltage signal. When the voltage of the voltage signal is too small, it indicates that the brightness of the ultrasound image is too dark. Therefore, the feedback adjustment module 30 will increase the signal compensation degree of the differential operational amplifier module through the differential adjustment signal. When the voltage of the voltage signal is too large, it indicates that the brightness of the ultrasound image is too bright. Therefore, the feedback adjustment module 30 will reduce the signal compensation degree of the differential operational amplifier module through the differential adjustment signal.

[0073] It should also be noted that the voltage reference chip in the feedback adjustment module 30 is used to detect the voltage signal size, and the voltage follower is used to isolate circuit interference so that the differential adjustment signal can be accurately output to the differential operational amplifier module.

[0074] Furthermore, the voltage follower includes a third operational amplifier, eighteenth to twenty-first capacitors, a thirteenth resistor, and a fourteenth resistor; the first pin of the third operational amplifier is connected to the first end of the fourteenth resistor, the first end of the fourteenth resistor is connected to the second end of the thirteenth resistor, the second pin of the third operational amplifier is connected to the first end of the nineteenth capacitor, the third pin of the third operational amplifier is connected to the second end of the eleventh resistor, the fourth pin of the third operational amplifier is connected to the first end of the thirteenth resistor, the fifth pin of the third operational amplifier is connected to the first end of the eighteenth capacitor, the first end of the eighteenth capacitor is connected to an external power supply, the second end of the eighteenth capacitor is grounded, the first end of the nineteenth capacitor is connected to an external power supply, the second end of the nineteenth capacitor is grounded, the first end of the thirteenth resistor is connected to the first end of the twentieth capacitor, the second end of the thirteenth resistor is connected to the second end of the twentieth capacitor, the first end of the twenty-first capacitor is connected to the second end of the fourteenth resistor, the first end of the twenty-first capacitor is also connected to the second pin of the second operational amplifier, and the second end of the twenty-first capacitor is grounded.

[0075] It should be noted that the eighteenth capacitor and the nineteenth capacitor in the voltage follower circuit are decoupling capacitors whose main function is to be used for power supply filtering to make the voltage applied to the third operational amplifier more stable. The thirteenth resistor and the twentieth capacitor are connected in parallel in the circuit to form a micro-filter circuit to reduce the noise signal in the differential adjustment signal.

[0076] This embodiment reduces the noise signal in the differential drive signal by performing signal conversion and signal transmission on the single-ended analog signal, improves the signal-to-noise ratio of the differential drive signal in the overall TGC drive circuit, and enables the front-end analog chip to parse data with lower noise, thereby solving the ultrasonic image interference problem caused by the noise of the existing TGC drive circuit, and ultimately obtaining a high-resolution ultrasonic gain compensated image.

[0077] To achieve the above objectives, the present invention further provides a TGC driver device, comprising the TGC driver circuit described above. The specific structure of the TGC driver circuit is similar to that of the aforementioned embodiments. Since the present TGC driver device utilizes all the technical solutions of all the aforementioned embodiments, it at least possesses all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore, no further elaboration is required here.

[0078] To achieve the above objectives, the present invention further provides a TGC driver device, comprising the TGC driver apparatus described above. The specific structure of the TGC driver device is similar to that of the aforementioned embodiments. Since the present TGC driver device utilizes all the technical solutions of all the aforementioned embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated here.

[0079] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A TGC driving circuit, characterized in that: The TGC driving circuit includes: a signal conversion module, a differential operational amplifier module and a feedback adjustment module, wherein the differential operational amplifier module is connected to the signal conversion module and the feedback adjustment module respectively; The signal conversion module is used to output a filtered single-ended analog signal to the differential operational amplifier module when receiving a digital driving signal; The differential operational amplifier module is used to differentiate the single-ended analog signal, perform secondary filtering on the obtained differential signal, and output a differential drive signal to the ultrasonic diagnostic device, so that the ultrasonic diagnostic device outputs a voltage signal to the feedback adjustment module; The feedback adjustment module is configured to output a differential adjustment signal to the differential operational amplifier module upon receiving the voltage signal; The differential operational amplifier module is further configured to perform signal processing on the differential drive signal upon receiving the differential adjustment signal, and drive the ultrasonic diagnostic device to operate via the processed differential drive signal; The signal conversion module includes a DAC chip, first to third capacitors, a first resistor and a second resistor; The differential operational amplifier module includes an operational amplifier circuit unit and a signal filtering unit, and the operational amplifier circuit unit includes an impedance matching subunit and a differential amplifier subunit; The impedance matching subunit includes a first operational amplifier, a third resistor, a fourth capacitor and a fifth capacitor; The first pin of the first operational amplifier is connected to the first end of the third resistor, the second pin of the first operational amplifier is connected to the first end of the fifth capacitor, the third pin of the first operational amplifier is connected to the first end of the third capacitor, the fourth pin of the first operational amplifier is connected to the first end of the third resistor, the fifth pin of the first operational amplifier is connected to the first end of the fourth capacitor, the first end of the fourth capacitor is connected to an external power supply, the second end of the fourth capacitor is grounded, the first end of the fifth capacitor is connected to the external power supply, the second end of the fifth capacitor is grounded, and the second end of the third resistor is connected to the differential amplifier unit.

2. The TGC driving circuit according to claim 1, wherein: The first pin, the second pin and the third pin of the DAC chip are connected to the FPGA circuit, the fifth pin of the DAC chip is grounded, the eighth pin of the DAC chip is connected to the first end of the first capacitor, the first end of the first capacitor is connected to an external power supply, the second end of the first capacitor is grounded, the fourth pin of the DAC chip is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the first end of the first resistor, the first end of the first resistor is also connected to the first end of the second resistor, the second end of the first resistor is grounded, the second end of the second resistor is connected to the first end of the third capacitor, the second end of the third capacitor is grounded, and the first end of the third capacitor is connected to the differential op amp module.

3. The TGC driving circuit according to claim 2, wherein: The operational amplifier circuit unit is connected to the signal filtering unit; The operational amplifier circuit unit is configured to, upon receiving the single-ended analog signal, perform differential operation on the single-ended analog signal and output the differential drive signal to the signal filtering unit; The signal filtering unit is used to perform secondary filtering on the differential driving signal when receiving the differential driving signal and transmit the signal to the ultrasonic diagnostic device, so that the ultrasonic diagnostic device outputs a voltage signal to the feedback adjustment module.

4. The TGC driving circuit according to claim 3, wherein: The impedance matching subunit is configured to process the single-ended analog signal upon receiving the single-ended analog signal, and transmit the processed single-ended analog signal to the differential amplification subunit; The differential amplifier unit is configured to, upon receiving the processed single-ended analog signal, perform differential processing on the processed single-ended analog signal and output the differential drive signal to the signal filtering unit.

5. The TGC driving circuit according to claim 4, wherein: The differential amplifier subunit includes a second operational amplifier, fourth to sixth resistors and sixth to ninth capacitors; A first pin of the second operational amplifier is connected to the second end of the fourth resistor, a second pin of the second operational amplifier is connected to the feedback adjustment module, a third pin of the second operational amplifier is connected to the first end of the seventh capacitor, a fourth pin of the second operational amplifier is connected to the signal filtering unit, a fifth pin of the second operational amplifier is connected to the signal filtering unit, a sixth pin of the second operational amplifier is connected to the first end of the eighth capacitor, a seventh pin of the second operational amplifier is connected to the second end of the eighth capacitor, an eighth pin of the second operational amplifier is connected to the second end of the third resistor, and a ninth pin of the second operational amplifier is connected to the second end of the eighth capacitor. The first end of the sixth capacitor is connected to the first end of the fifth resistor, the second end of the sixth capacitor is connected to the second end of the fifth resistor, the first end of the fifth resistor is connected to the second end of the third resistor, the second end of the fifth resistor is connected to the signal filtering unit, the first end of the seventh capacitor is connected to an external power supply, the second end of the seventh capacitor is grounded, the first end of the eighth capacitor is connected to an external power supply, the second end of the eighth capacitor is grounded, the first end of the ninth capacitor is connected to the first end of the sixth resistor, the second end of the ninth capacitor is connected to the second end of the sixth resistor, the first end of the sixth resistor is connected to the second end of the fourth resistor, and the second end of the sixth resistor is connected to the signal filtering unit.

6. The TGC driving circuit according to claim 5, wherein: The signal filtering unit includes seventh to tenth resistors and tenth to thirteenth capacitors; The first end of the tenth capacitor is connected to the second end of the fifth resistor, the second end of the tenth capacitor is connected to the second end of the seventh resistor, the first end of the eleventh capacitor is connected to the second end of the sixth resistor, the second end of the eleventh capacitor is connected to the second end of the eighth resistor, the first end of the seventh resistor is grounded, the second end of the seventh resistor is connected to the first end of the ninth resistor, the first end of the eighth resistor is grounded, the second end of the eighth resistor is connected to the first end of the tenth resistor, the first end of the twelfth capacitor is grounded, the second end of the twelfth capacitor is connected to the second end of the ninth resistor, and the second end of the ninth resistor is also connected to the ultrasonic diagnostic equipment. The first end of the thirteenth capacitor is grounded, the second end of the thirteenth capacitor is connected to the second end of the tenth resistor, and the second end of the tenth resistor is also connected to the ultrasonic diagnostic equipment.

7. The TGC driving circuit according to claim 6, wherein: The feedback adjustment module includes a voltage reference chip, a voltage follower, fourteenth to seventeenth capacitors, an eleventh resistor, and a twelfth resistor; The first pin of the voltage reference chip is connected to the second end of the sixteenth capacitor, the second pin of the voltage reference chip is connected to the second end of the seventeenth capacitor, the third pin of the voltage reference chip is connected to the first end of the fourteenth capacitor, the fourth pin of the voltage reference chip is connected to the first end of the fifteenth capacitor, the fifth pin of the voltage reference chip is connected to the first end of the sixteenth capacitor, the sixth pin of the voltage reference chip is connected to the first end of the seventeenth capacitor, the second end of the fourteenth capacitor is grounded, the second end of the fifteenth capacitor is grounded, and the first end of the fourteenth capacitor is connected to the first end of the fifteenth capacitor The first end of the fourteenth capacitor is also connected to the ultrasonic diagnostic equipment, the first end of the eleventh resistor is connected to the first end of the sixteenth capacitor, the first end of the eleventh resistor is also connected to the first end of the seventeenth capacitor, the first end of the twelfth resistor is connected to the second end of the eleventh resistor, the second end of the twelfth resistor is connected to the second end of the sixteenth capacitor, the second end of the twelfth resistor is grounded, the second end of the twelfth resistor is also connected to the second end of the seventeenth capacitor, the voltage follower input end is connected to the second end of the eleventh resistor, and the voltage follower output end is connected to the second pin of the second operational amplifier.

8. A TGC driving circuit device, characterized in that: The TGC driving circuit device includes the TGC driving circuit according to any one of claims 1 to 7.

9. A TGC driving circuit device, characterized in that: The TGC driving circuit device includes the TGC driving circuit arrangement according to claim 8.

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